Improvement in anti-fbiction jouenals fob oae-wheels



geiten tetes @anni @ffice CHARLES ri. .Prusia-ALL, oF-Dnrnoir-MIGHIGAN.

Letters Patent No. 71,527, dated November 26, 1867.

IMPROVEMENT IN ANTI-FRIGTION JOURNALS FOB, GAR-WHEELS, tito.

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' TO ALL WHOM IT MAY CONGERN:

l Be it known that I, CHARLES H..PARsHALL, ot Detroit, in the county of Wayne, and State of Michigan, have invented a new and useful Improvement in Bearings for Railroad-Car Journals'and Wheels; and I do hereby declare that the following isa full, clear, and exact description of the same, reference being had to the annexed drawings, in which'- Y Figure 1 isv alongitudinal section, and

Figure 2^is a side elevation. l

The same letters in both gures indicate parts which are identical. l

My invention consists in the use et' anti-friction bearings for supporting the journals of railway-oar axles, and also in attaching one fast and one loose wheel, the latter also'tnrning upon a similar bearing.

The following description will enable persons skilled in the art to apply my improvement:

A series of cylindrical Nmetallic rollers, A,'is constructed with journals C, projecting from the centre of each end, by which the rollers are attached to two steel rings, B B, the journals passing throughround holes J, bored equidista'nt from one another through the rings, and permitting the rollers to turn freely on their axes. The rings are then united by a'series of rods,'D, passing through both rings. The rings are narrower than the diameter of the rollers, so that the rollers shall project beyond both the outside and inside edges of the rings, thus forming a. bearing, either for a journal passing through the centre, or for the hub of u wheel within which the anti-friction hearing is placed. Y

Two of the anti-frriction bearings thus constructed are used on the outer ends of the axles, which project through the hubs of the wheels, and support the boxes placedwithin the pedcstals. A cap covers one end of the box, placed' on the end ofthe axle, through which there isaY hole to receive a pointprojecting from the end 'of the axle, while a cap-on the side ofthe pedestal will hold the anti-friction bearing in plaoe.- I attach o ne of-the wheels rigidly to the axle in therusual manner; the other turns freely around thel axle. '.llhe hub must be bored large enough to-permit an anti-friction bearing to be slipped over the axle, and form n. hearing for the wheel..

-.By making the wheels thus, one tight and one loose, the cars may be run around curves of short radius, Without any undue strain upon the axle, as thc loose wheel may turn either faster or slower, as it may happen to 'be on the outer and longer or inner and shorter track. By using thc hereinbefore-dcscribed bearings Ireduce the friction to the practical minimum.

I am aware that anti-friction bearings have been used for railway-axle journals, and that they have been used with a. loose wheel. I do not, thereforeclai-m the use of either separately, but what I do claim as my invention, and desire to secure by Letters Patent, is-

In combination'with-the pedestals and axle of a railroad-'cm3 two anti-friction bearings, constructed sul)d stantially as set forth, and also a tight and a loose wheel, the latter turning upon a similar hearing, lsubstantially as and for the purpose set forth.

CHARLES H. IARSHALL; Witnesses! Herr Posr', GEO. S. Swirr. 

